<template>
  <div class="swiper-container" ref="swiper">
    <div class="swiper-wrapper">
      <div
        class="swiper-slide"
        v-for="(slide, index) in skuImageList"
        :key="slide.id"
        @click="slideClick(index)"
      >
        <img :src="slide.imgUrl" :class="{ active: currrentIndex == index }" />
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
import Swiper from "swiper";
export default {
  name: "ImageList",
  //传入轮播图显示图片的父级 并在上面遍历这个图片
  props: ["skuImageList"],
  data() {
    return {
      currrentIndex: 1,
    };
  },

  watch: {
    skuImageList(newvalue, oldvalue) {
      this.$nextTick(() => {
        //组件实例挂载完 new  swiper实例
        new Swiper(this.$refs.swiper, {
          // 如果需要前进后退按钮
          navigation: {
            nextEl: ".swiper-button-next",
            prevEl: ".swiper-button-prev",
          },
          //可以轮播效果
          // loop: true,
          //轮播图 默认显示三张图片
          slidesPerView: "3",
        });
      });
    },
  },
  methods: {
    //当轮播图中的图片被点击到的时候 加样式
    slideClick(index) {
      this.currrentIndex = index;
      //点击的对应图片  让兄的zoom的大图 也显示对应的
      this.$bus.$emit("getNowImg", index);
    },
  },
};
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;
    &::after {
      font-size: 12px;
    }
  }
}
</style>